I mean, yes and no. They just capture device info for a location, which can often be tied back to a person, but they just grab the info the phone sends to the tower. These days with Bluetooth and Wi-Fi you can even do something similar with just your phone

I don’t love that it exists for obvious reasons, but it’s a far cry from looking through your phone

I mean, the cell providers already sell your location info to anyone (including LEO, which is unconstitutional without a warrant as far as I’m concerned), as can Google, apple, and all sorts of apps - so this is a niche thing

FWIW, you can defeat that pretty simply… Just leave your phone behind and/or in a faraday pouch. No signal, no signature, no location data (from your phone at least). It won’t necessarily stop the NSA, but it’ll protect you in a protest where your just another face in the crowd